[e7b9]

Musical intervals map mathematical ratios to emotional perception (i.e. all minor thirds: feel similar, are { lower, (6/5)*lower } frequency pairs). For a long time I've wondered if there's anything analogous in the world of color (since both are waves), but have been unsatisfied with the non-answers I've found.

[dspig]

Maybe there is, but not for humans!

If we sensed sound like we sense colour we'd only hear the amount of bass/mid/treble not the individual pitches.

But if there's such a thing as a non-linear medium for light, then transmitting two wavelengths through it should do interesting things depending on the ratio of the wavelengths?